:root {
    
    --bg-color: #0a0a23; 
    --text-color: #fff; 
    --highlight-color: #74ebd5; 
    --button-color: #4CAF50; 
    --button-hover-color: #43A047; 
}

body, html {
    background: var(--bg-color);
    background-size: cover;
    height: 100%;
    font-family: 'Arial', sans-serif; 
    font-size: 15.5px;
    color: var(--text-color);
    user-select: none;
    margin: 0;
    padding: 0;
}

html {
    width: 100%;
    overflow: hidden; 
}

.chat-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: none; 
    overflow-y: auto;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5); 
}

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1); 
    box-sizing: border-box;
    border-radius: 10px; 
}

.message-input {
    flex: 0;
    border: 1px solid var(--highlight-color);
    outline: none;
    padding: 10px;
    box-sizing: border-box;
    margin-right: 5px;
    width: calc(100% - 110px); 
    background: rgba(255, 255, 255, 0.2); 
    border-radius: 5px; 
    color: var(--text-color);
}

.send-button {
    flex: 0;
    padding: 10px 20px;
    border: none;
    background-color: var(--button-color);
    color: white;
    cursor: pointer;
    border-radius: 5px; 
    margin-left: 5px;
}

.send-button:hover {
    background: linear-gradient(to bottom, var(--button-color), var(--button-hover-color));
}


@keyframes blink {
    50% { opacity: 0.5; }
}

.chat-container {
    animation: blink 2s infinite; 
}